import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'

import Cate from '../components/cate/Cate.vue'
import AddBlog from '../components/blog/AddBlog.vue'
import TagList from '../components/tag/TagList.vue'
import BlogList from '../components/blog/BlogList.vue'
import EditBlog from '../components/blog/EditBlog.vue'

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect: '/home'
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [
      {
        path: '/welcome',
        component: Welcome
      },
      {
        path: '/category',
        component: Cate
      },
      {
        path: '/addArticle',
        component: AddBlog
      }, 
      {
        path: '/tag',
        component: TagList
      },
      {
        path: '/articleList',
        component: BlogList
      },
      {
        path: '/blogEdit',
        component: EditBlog
      }
    ]
  }
]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 从哪里来
  // next() 放行 next('login') 强制跳转
  if (to.path === '/login') {
    return next()
  }
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) {
    return next('/login')
  }
  next()
})

export default router
